For a good while now, my Sovereign-class ship has been equipped with Jem'Hadar Combat Impulse Engines. When visuals are enabled (and they usually are), the ship's impulse engines
should be reddish/purple with purple exhaust. All to often these days, however, when I have visuals enabled I get this:

... Impulse engines are vanilla red while the exhaust is purple.
What is up? Why can't I have my custom-colored impulse engines? It did seem to get fixed, right before the "server not responding" problem started really acting up again. Now it's back to the "red engines/purple exhaust" thing. What is going on?
Comments
This game is in need of a serious Graphics engine update/bug fixes, but they're to lazy to do that it seems.